package com.mdl.common.util;

import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;


/**
 * @author 刘天宇
 * @date 2018年02月01日
 * @time 下午12:00:38 
 * @tags
 */
public class HttpReqUtil {

	/**
	 * 向指定URL发送GET方法的请求
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立实际的连接
			connection.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送GET请求出现异常！" + e);
			result = "error";
			//e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, String param) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送 POST 请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}
	
	public static String sendPost(String urlParam, Map<String, Object> params) {
		StringBuffer resultBuffer = null;  
        // 构建请求参数  
        StringBuffer sbParams = new StringBuffer();  
        if (params != null && params.size() > 0) {  
            for (Entry<String, Object> e : params.entrySet()) {  
                sbParams.append(e.getKey());  
                sbParams.append("=");  
                sbParams.append(e.getValue());  
                sbParams.append("&");  
            }  
        }  
        HttpURLConnection con = null;  
        OutputStreamWriter osw = null;  
        BufferedReader br = null;  
        // 发送请求  
        try {  
            URL url = new URL(urlParam);  
            con = (HttpURLConnection) url.openConnection();  
            con.setRequestMethod("POST");  
            con.setDoOutput(true);  
            con.setDoInput(true);  
            con.setUseCaches(false);  
            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
            if (sbParams != null && sbParams.length() > 0) {  
                osw = new OutputStreamWriter(con.getOutputStream(), "utf-8");  
                osw.write(sbParams.substring(0, sbParams.length() - 1));  
                osw.flush();  
            }  
            // 读取返回内容  
            resultBuffer = new StringBuffer();  
            int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
            if (contentLength > 0) {  
                br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));  
                String temp;  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        } finally {  
            if (osw != null) {  
                try {  
                    osw.close();  
                } catch (IOException e) {  
                    osw = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
            if (br != null) {  
                try {  
                    br.close();  
                } catch (IOException e) {  
                    br = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
        }  
  
        return resultBuffer.toString();
	}


	public static String sendMsgPost(String urlParam, Map<String, Object> params) {
		StringBuffer resultBuffer = null;
		params.put("template_id", "");
		params.put("form_id", "");
        // 构建请求参数  
        StringBuffer sbParams = new StringBuffer();  
        if (params != null && params.size() > 0) {  
            for (Entry<String, Object> e : params.entrySet()) {  
                sbParams.append(e.getKey());  
                sbParams.append("=");  
                sbParams.append(e.getValue());  
                sbParams.append("&");  
            }  
        }  
        HttpURLConnection con = null;  
        OutputStreamWriter osw = null;  
        BufferedReader br = null;  
        // 发送请求  
        try {  
            URL url = new URL(urlParam);  
            con = (HttpURLConnection) url.openConnection();  
            con.setRequestMethod("POST");  
            con.setDoOutput(true);  
            con.setDoInput(true);  
            con.setUseCaches(false);  
            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
            if (sbParams != null && sbParams.length() > 0) {  
                osw = new OutputStreamWriter(con.getOutputStream(), "utf-8");  
                osw.write(sbParams.substring(0, sbParams.length() - 1));  
                osw.flush();  
            }  
            // 读取返回内容  
            resultBuffer = new StringBuffer();  
            int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
            if (contentLength > 0) {  
                br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));  
                String temp;  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        } finally {  
            if (osw != null) {  
                try {  
                    osw.close();  
                } catch (IOException e) {  
                    osw = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
            if (br != null) {  
                try {  
                    br.close();  
                } catch (IOException e) {  
                    br = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
        }  
  
        return resultBuffer.toString();
	}
	private static Map<String, Object> json2Map(String jsonText) {
		Map<String, Object> objMap = new HashMap<String, Object>();
		ObjectMapper mapper = new ObjectMapper();
		try {
			objMap = mapper.readValue(jsonText, Map.class);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return objMap;
	}
}